Method: The drug were infused to stomach of mice and stomach residual rate, small intestine advance rate, stool quantity and pain threshold were observed.
方法：采用小鼠灌胃给药的方法，分别观察实验动物胃内容残留率、小肠推进率、粪便排出量及痛阈值的变化。
2
For a loss modulation where the threshold carrier density may change, the neglected term may become comparable to the retained first order small quantity.
The initially existing damage has apparently affected on wave stress propagation and stress distribution as long as its quantity exceeds a threshold value.